Update outage only on status change (librenms#19961)

Author: murrant

app/Actions/Device/SetDeviceAvailability.php

@@ -34,7 +34,9 @@ public function execute(Device $device, bool $available, AvailabilitySource $sou
 
         if ($commit) {
             $device->save();
-            $this->updateDeviceOutage->execute($device, $available);
+            if ($changed) {
+                $this->updateDeviceOutage->execute($device, $available);
+            }
         }
 
         return $changed;